Auxiliary air furnishing device



oct. 29, 1946. P@ Q NILLES HAL 2,410,125

AUXILIARY AIR FURNISHING DEVICE Fiied June 25, 194e (w Ei RNEY.

Patented Oct. 29, 1946 UN IT ED STATES PATENT F FICE AUXILIARY AIR; FURNISHING DEVICEr Philip C. Nilles and'Joseph A. Steffen,Chi'cag,o, Ill.

Application-June25, 1946, SerialNo. 679,254

2- Claims.v l

This invention relates to improvementsin aux iliary air furnishing devicesy for internal; combustion and similar motors, having for an objective toprovid'e a devicev particularly advantageous for supplying additional quantities-of air to the gaseous fuelv delivered t'othe motor cylinder combustion chambers. through its intake manifold from the motor charge-forming means or carburetor, whereby tio-complement and admix with the same-and! thus, materially increase'the corn--y crank case and detrimentally" dilute-the lubricating oil therein contained.

Moreover, it is an object of the invention tof provide a device of the stated character which", when connected to the motor intake manifold and upon operation of suc-liy motorL will function to automaticallyv supply additional quantities ofA` ai'r to and for admixture with the gaseous fuel owing through said manifold from thel motorv charge-forming device, the volume of such quantities of airA being proportionedY or regulated according to the degree of suction in the manifold, so that when the suction increases, as when-thev motor throttle is substantially closed', i. er, the motor is idling, the supplyof additional air will' be proportionately increased in effectual ratio to' the amount of gaseous fuel 'then being; drawnl from the charge-forming device intoythe firing' chambers of the motor cylinders, thus', perfecting its combustibili'ty and insuring the attainment and maintenance of maximum motor performance'and operating economies.

Itis, also an object of the invention to'provide the device with adjustable suction responsive means for controlling or governing resistance to movementY of the valves of the device in their respective chambersandv from their seats; and to so house suchy means as to afford th'emwith positive protection from foreign means and disturbances of" the particular'adjustments thereof.,

Itf isa further' object of' the invention to' provide one of" the'lvalve' means of. the device with ports so arranged in its casing' that when progressivev movement of the valve therein is effected' 2. controlled quantities or Volumes, of air being' ca;- pable of being discontinued by'mechanicalmeans; at the desire or optionof. a user.

Yetanother:r object: of the invention is to: pro-J vide a-device of thecharacter'mentioned, whose. elements of construction. areso designed and assembled asv to.- permit convenient. and readyacjc'ess to be hadto its working; parts. for adjustment,I cleaning, repair or the like.

Other objects of..Y the invention 'will be in; part obvious and-v in. part pointed out'hereinafter. v

In order thatl the invention. and its/mode of operation may: be understood by thoseskille'd in the art to which it appertains, we.- havey in the accompanying illustrativel drawing andfin the detailed following description based thereon, setr out one possible embodiment of our invention.V

In the-drawing:

Figure 1 is a more or less schematicrside view of a combustion motor having its intake manifold equippediwith the invention;v v f Figure 2 is al sideelevation ofthe improved device;

Fig. 3 isa longitudinal section through the.

same.

Figure lisV a transverse section taken on the line yll`4 of Figure 3, lookin-gY in the direction inl which the arrowspoint.

Figure 5 is a similar section taken: on the lineY 5-5 of Figure 3, looking in the direction inlwhichf the arrows point. I V' Figure 6 is a similar section taken onthe line --G of Figure 3', looking in the direction inY which: the arrows point.

Figure '7 is a transverse section similar to Fig-A ure 6, but wherein the sleeve valve is shown in closed position with respect to the air intake ports of. the adjacent valve casing, and

Figure 8 is a transverse sectionv taken on the line 8-,8 of' Figure 3,' looking inthe direction'inwhich the arrows point. Y

Having more particular reference'to the drawing, in connection with `which like rcharacters will designate corresponding parts throughout, M indicates the intake manifold ofan internal combustion motor ofthe multiple cylinder type having` our improved device operatively connected, thereto. The' device is indicated in its entirety bythe reference letter D. It` comprisesa casing |made of metal or,` other suitable; mate;-` rial, substantially cylindrical in form. Co-axially disposed chambers 2 and' 3 are formed in the longitudinally opposite portions of' said casingv Iy and open ontoy the adjacentrends of' the same; a mediauyiccated longitudinauy disposed Way 4 being formed in the intermediate portion of the casing and intercommunicatively connecting said chambers 2 and 3. The inner open end of the chamber 2, i. e., the adjacent end of the casing I is ground or otherwise prepared to provide av valve seat, the purpose of which will be presently described, while a plurality of radially disposed air-inletting ducts, generally designated by the numeral 5, are formed in the sides of said casing and are so positioned as to communicate With the inner end portion of the chamber 2, as shown in Figure 3.

The opposite end portions of the casing I are preferably externally screw-threaded, as at 6. Engaged with that screw-threaded. portion 6 of the casing I adjacent the chamber 2, is a T-tting or coupling l, having the ends of its head portion internally screw-threaded and one thereof engaged with the adjacent screw-threaded portion 6 of the casing I. The leg portion of the'-T-tting, indicated at 8, has its free end externally Iscrew threaded and thus, provides means for effecting connection -of said tting with an appropriate portion of the intake manifold M, by way of a suitable `internally screwthreaded opening formed therein. Thus, an operating and supporting connection will be eiiected between the devices and the charge-forming device or carburetor C.

The outer or remaining screw threaded portion 6 of the casing I has a cap 9 engaged therewith, said cap being provided with an externally located opening IIB in its outer side communieating with the chamber 2.

A stem valve I2 is arranged within the casing I and as will be noted upon reference to Figure 3, its head II is adapted to be normally seated upon the ground or otherwise prepared seat portion of the body 2 over the open inner `end of the chamber 3 in spaced relation to the aforesaid air-inletting ducts 5. A perforate disc or plate II is engaged and fixedly arranged in the open inner end of the chamber 2 and a centrally located opening therein slidably receives an adjacent portion of the valve stem I2 therethrough. The valve stern is longitudinally disposed throughout chambers 2 and 3 an intermediate portion thereof being snugly and slidably received in the way 4. The free or remaining portion of the stem I2 extends through the opening I in the cap S beyond the chamber Z and is preferably screw-threaded, as at I3. Engaged over and about the valve stem I2 is an expansion type of helical spring I4, whose inner end has bearing engagement with the inner end wall of the chamber 2, while its outer end has bearing engagement upon a tension adjusting nut l turned into engagement with the screw-threaded portion I3 of the stem I2. If desired, a locking nut I5 may be turned onto said screwthreaded portion I3 into abutting engagement with the tension adjusting nut I5, for an obvious purpose.

VIt may be here noted that the positioning of the free or outer end of the valve stern I2 aligns with the opening I Il in the cap 9, as shown in justability between the engaged end. of the easing I and the head of the T-tting l, the former may be turned upon the latter, at times, to insure absolute huid-tightness of the device, such for example, as may be required in the instance of wearing of the engaged elements. Moreover, by reason of the screw threading of the outer end of the casing I, it will be understood and appreciated that the internally screw-threaded cap 9 may be longitudinally adjusted with re- 'spect to said end of the casing in order that the free end of the portion of the stem I2 may, at times, be completely housed Iwithin and protected by said cap 9 against interference from foreign objects.

A second casing I6 is provided the device and is made of metal or other suitable material, preferably in substantially cylindrical form. A chamber I'I is provided within the casing I5 and has a perforate wall I8 formed in its normally inner end. Its outer end is open and is adapted to be normally closed by the screw-threaded engagement of a closure cap I9 thereover, as is also shown in Figure 3. The inner end of the Vcasing I6, i. e., that end provided with the perforate wall I8, is externally screw-threaded and is adapted to be turned into fixed engagement with the remaining end of the hea/d of the T-fitting 'I in opposed relationship to the casing I. A plurality of circumferentially arranged air-inletting ducts 20 are formed in the side walls of the casing I6 in proximity to the normally inner portion thereof and as will be noted, upon reference to Figure 2, extend over an intermediate portion of said casing I6. To control communication between the chamber Il and the atmosphere or outside, a sleeve-valve 2| is snugly and rotatively engaged over and about the intermediate portion of the casing I6 and is provided with ports generally indicated by the numeral 22, corresponding in number and placement with that of the adjacent air-inletting duets 29. Thus, by rotation of the sleeve-valve 2| to a predetermined position, its ports 22 may be registered with the air-inletting ducts 2B. By rotation of said sleeve in an opposite direction, said air-inletting ducts 20 may be closed. To facilitateY rotation of the sleeve-valve 2 I, an arm 23 is fixedly connected with the same and is adapted to be engaged by a suitable manually operable motion transmitting means 24 engaged at one end with an outer portion of said arm 23, as at 25, and having its remaining or free end extended to a point remote from said arm 23.

A cylindrical cup-like valve 26 is snugly and slidably received in the chamber I'I of the casing I6 and during its longitudinal movement, at times, therein, is adapted to cover or uncover certain or all of the air-inletting ducts 20, thus controlling atmospheric communication with the chamber I 1. An expansible coiled spring 21 is longitudinally arranged in the chamber I'I of the casing I6 and one end thereof has fixed bearing engagement with an adjacent side of the perforate wall I8, while its opposite end portion is received in the cup-like slidable cylindrical valve 26 and has bearing engagementwith .its bottom. Thus, it will be understood that the action of the adaptable spring coil'is such that the valve 26 will be normally retained in a position adjacent the outer end portion of the easingV I6; however, that inward sliding movement of said valve in the chamber I'I will be permitted.

In order that the valve 26 may have the extent of its outer sliding movement in the casing I6 limited or regulated as desired or required, we engage ve, set screw 28 through a screw 4threaded equipped` motor.I is;operating:v to eifactzwithim the;

intake: manifold;v M arsuctiore mca'suriizrg;slightly4 under "18;.inches-,- it; willibe seemthatrtheevadvef. 26% within the casing I6 will be drawnrirrwandlyf-by reasonL ofA theY influenceof-such suction thereupon,- to aposition within: said-casing where certain of fuel consumption.l will.y be,- effected., together with a. materially increasedpower: production.

'Thar amount. ofair; flowing through. our improved` dev-ica intothez-motor,y intake. mani-foldv M,. itwill be-` understood; will-[be automatically regulated. according; to the degree; of suction, existingV within thee intake, manifold M-tha't is, thei speedr or character.' of. operation. ofthe equipped' motor. In pointrwith this, it Wiilubeunderstoodithatwhenthe,y intake manifold suction decreasesto au point less; than the. resistanceA of'v the. tensioned'coil'ed the air inletting ducts 20 will remain open or uncovered. Hence, a sufficient amount of air will be permitted to pass therethrough into the casing I6 for discharge into the connection 8 of the T-fitting 1, thus assuring combustibility ofthe gaseous fuel flowing from the charge forming device C. When the degree of suction within the intake manifold M is well under 18 inches, it will be seen that the tension of the coiled spring 21 engaging the valve 26 will be sufficient to councombustibility of the gaseous charge passing therethrough to the motor cylinders.

When motor operating conditions different from the foregoing prevail in a motor equipped with our improved device, i. e., when suction measuring over 18 inches is effected by the pistons working in the motor cylinders and is transmitted to the intake manifold M, combustible or carburated gaseous fuel will be drawn from the motor charge-forming device or carburetor C through the manifold M into the combustion or firing chambers of the motor cylinders. When this suction reaches a pre-determined degree, i. e., a point where it is desirable or advantageous that anr additional or auxiliary supply of air (other than that furnished by the charge-forming device or carburetor C) be admixed with the gaseous fuel flowing through the intake manifold M to increase its combustible characteristics, it

will be seen that the increased suction will causeV the valve 26 to be drawn inwardly in its casing I6 against the tension of the spring 21, thus, closing or covering all of the air inletting ducts 20 in said casing I6. At the same time, and by reason of the increased degree of applied suction, the valve l I'will be drawn inwardly or away from its seat adjacent the chamber 2. As the result of this opening of the valve Il, a properly metered supply of additional air will be drawnl into and through the T-tting 1 and its connection 8 via the air ducts 5 in the casing l. The thus secured additional supply ofair will admix with the fuel now flowing through the intake manifold M so that when the same is ultimately discharged into the combustion or firing chambers of the equipped motor cylinders, a maximum combustion or firing performance and economical spring I4', said. spring: will. immediatelyoperatey to automatically` return-thervalvc- Il' to.` its-closed position with respect to.` the chamber 2. when such .suction is undery approximately-181` inches, said valve lil` willi have been returnedg to its closed. positionf and` valve 213.2 ,Wi-ll'- operate-in: the manner herei-nbeforedscrib'ed. In: line-withv this statement, ift willi be understood thatLA the spring I4 of the valve Il has its tension so adjusted that when the degree of suction (partial vacuum) is 18 inches or over, said Valve Il will be caused to be drawn from its seat in the chamber 2 to admit a supply of air, in the manner above described.

When an equipped motor is working at high speeds, and under normal labor or stress, it is an established fact that the degree of suction within the manifold M will be decreased and at a substantial minimum. Therefore, under such motor operating conditions, the degree of suction may well be under 18 inches. At such times, it will be understood that the spring I4 of the valve l I will retain the latter in its closed position adjacent the chamber 2 and that the valve 26 sliding within the casing IB will then function against the inuence of the previously tensioned spring 21, to admit automatically kproportioned quantities of air through its air-inleting ducts 20 via the connection 8 of the T-'fitting 1 into the motor intake manifold M.

It will be thus understood that our improved device may be accurately regulated to admit properly proportioned or metered quantities of air so proportioned that when admixed with the gaseous fuel flowing through said intake manifold, will absolutely perfect the combustible properties or qualities thereof.

Under certain operating conditions it may become desirable to employ two or more of our improved devices upon the intake manifold of a motor and, of course, such conditions or requirements are comprehended by the invention.

With pitting or similar deterioration or wearing of the valve seats, the valve head Il, or the slidable valve 26, or its casing I6, access may be readily had to such parts of the device by merely removing them from the T-tting 1, whereupon the necessary repairs or replacement of parts, as conditions require, may be eifected.

Manifestly, the construction shown is capable of further modification, and such modification as is within the scope of our claims, we consider within the spirit of our invention.

We claim:

1. An auxiliary air furnishing device of the character described, comprising relat1vely opposed casings (each open at both ends), one of said casings having relatively opposed chambers in its opposite portions and each thereof opening onto the adjacent end of the casing and a way formed longitudinally of the casing between the said chambers communicating with each thereof, one of the chambers having air-inletting ducts formed in its walls communicating with the same in proximityto the inner end of said one of the casings, a valve seated adjacentthe inner end of said one of the casings over the adjacent end of the vcorresponding chamber, a stem on said valve slidably engaging through said Way and hav'- ing its free end portion extended longitudinally into the remaining'chamb'er, springs means engaging the'valve stem and a portion of said remaining chamber, means on the free portion of the'stem outwardly of said spring means for adjusting the tension of the latter, the remaining casing having a plurality of relatively staggered air-inletting ducts formed about its side Wall, a cylindrical valve slidably received Within said re- Y maining casing, means for normally maintaining said valve adjacent the outer end of the said second casing, a ported sleeve-Valve engaged about the side wall of said second casing cooperable with the air-inletting ducts therein, means closing the outer end of said casing-.and means engaged with therespective inner ends ofeach of said casings for'connecting the same to a manifold.

2. An auxiliary air furnishing device, comprising relatively opposed casings each having a way in the inner end thereof and each of said cas'- ings having air-inletting means in its respective Wall beyond its said Way, spring engaged valve means normally seated adjacent and over the Way of one casing, a spring engaged cylindrical 'valve slidably received in theremaining casingnormally arranged beyond the air-inletting openings in said remaining casing, and means engaging the adjacent ends of the opposed casings for communieably connecting the same to an intake manifold.

PHILIP C. NILLES. JOSEPH A. STEFFEN. 

